Java Writer append(CharSequence, int, int)用法及代码示例

Java中Writer类的append(CharSequence，int，int)方法用于将指定charSequence的指定部分追加到writer上。此charSequence用作参数。要写入的开始索引和结束索引也被当作参数。

用法:

public void append(CharSequence charSequence, int startingIndex, int endingIndex)

参数：此方法接受三个强制参数：

charSequence这是要写入流中的charSequence。
startingIndex这是获取字符部分的起始索引。
endingIndex这是要写在编写器上的结尾索引。

返回值：此方法不返回任何值。

下面的方法说明了append(CharSequence，int，int)方法的用法方式：

程序1:

// Java program to demonstrate 
// Writer append(CharSequence, int, int) method 
  
import java.io.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        try { 
  
            // Create a Writer instance 
            Writer writer 
                = new PrintWriter(System.out); 
  
            // Get the charSequence 
            // to be written in the writer 
            CharSequence charSequence = "GeeksForGeeks"; 
  
            // Get the starting index 
            int startingIndex = 0; 
  
            // Get the length of char 
            int endingIndex = 5; 
  
            // Write the portion of the charSequence 
            // to this writer using append() method 
            // This will put the charSequence in the writer 
            // till it is printed on the console 
            writer.append(charSequence, 
                          startingIndex, 
                          endingIndex); 
  
            writer.flush(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

Geeks

程序2:

// Java program to demonstrate 
// Writer append(CharSequence, int, int) method 
  
import java.io.*; 
  
class GFG { 
    public static void main(String[] args) 
    { 
  
        try { 
  
            // Create a Writer instance 
            Writer writer 
                = new PrintWriter(System.out); 
  
            // Get the charSequence 
            // to be written in the writer 
            CharSequence charSequence = "GFG"; 
  
            // Get the starting index 
            int startingIndex = 2; 
  
            // Get the length of char 
            int endingIndex = 3; 
  
            // Write the portion of the charSequence 
            // to this writer using append() method 
            // This will put the charSequence in the writer 
            // till it is printed on the console 
            writer.append(charSequence, 
                          startingIndex, 
                          endingIndex); 
  
            writer.flush(); 
        } 
        catch (Exception e) { 
            System.out.println(e); 
        } 
    } 
}

输出：

相关用法

注：本文由纯净天空筛选整理自Code_r大神的英文原创作品 Writer append(CharSequence, int, int) method in Java with Examples。非经特殊声明，原始代码版权归原作者所有，本译文未经允许或授权，请勿转载或复制。